Sheet-metal article.



PATENTED JUNE 23, 1908.

H. B. FULLER.

SHEET METAL ARTIGLE.

APPLIGATIOVN IILEDNOV. 23, 1901.

I No. 891,242;

UNITED STATES PATENT OFF-ICE.

HARVEY B. FULLEB,\OF ST. PAUL, MINNESOTA.

srcEE'r-m'mr. ARTIGLE.

: Tocll whom it may concern:

Be it known that I, HARVEY B. FULLER, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Sheet-Metal Articles, of which the following is a specification.

My invention relates to improvements in ladders, its ob'ect being to construct a ladder of sheet metal so bent as to give the maximum rigidity andstrength and to. allow adj ustment and extension.

To this end my invention consists-in the features of construction and combination hereinafter described and claimed.

Figure 1 is a front elevation of a ladder constructed in accordance with my invention, Fig. 2 is a section on line ac-x of Fig. 1,' Fig. 3 is a front elevation of amodified construction of ladder, Fig. 4 is a section on line y-y of Fig. 3, Fig. 5 is a detail of one end of one of the rungs used in the construction shownin Fig. 1, Fig. 6 is asection of said rung, Fig-7 is a detailof one of the rungs used in the construction shown in Fig. 3, Fig. 8 is a detail of. art of one of the side bars shown in Fig. 1, ig. 9 is a section on line z z of' F1". 8,

Fig. 10 is a detail of-a portion of one o the ,side bars shown in Fig. 3, and Fig. 11 is a-sec-' tion on line H of Fig. 10. v

' Itwill be noted that all the different constructions shown in the drawin s are made of sheet metal properly bent to allow' the parts to be secured together to give maximum rigidity and strength, and to allow of adjustment and extens1on.'-

Referring to Fig. 1A represents the side bars of the ladder ofsheetmetal bent to form oblong tubes-having ortions of their edges at suitable distances cut and bent outward Iyfl B anges 2. etween a art to form paralle I t e flanges 2 are secured parallel strips 3 con- Specification of Letters Patent. Application filed November 23, .1901. Serial No. 83,380.

stituting the ends of the run s 51 The rungs. 4 are ofbent sheet metal pre erably provided With inwardly turned central strips 5.- .The extension ladder is. com osed of a series of similar sections the side ars of each section being slightly smaller than those of .the preceding section so as to telescope within the same. I

. In Fig.3the side bars B have their edges 6 bent-outwardl to fit between the parallel end flan es 7 o the rungs 8 as shown in Fig. 4.

It will be evident that my features of coristruction may be used equally well in an.

Patented June 23, 1908.

alogous constructions such asbuilding plat- .forms, skids, step-ladders, etc., the scope of y invention being defined in the following claims.

.Iclaimzsides or standards thereof being provided with slit and bent pockets or seats; an the steps being rovided with flanges thereon for fitting wit in said pockets or seats.

'2. A ladder comprising steps; sides or standards of sheet metal and having o en ings therein for the reception of the en sof 'saulsteps, and fianges integralwith and extending out from the body of said standards 7 a for forming said openings and 'iorsupporting said ste s; 3. A ladderconstruction of sheet metal the sides or standards. thereof being provided portions thereon to form with slit and bent portions thereon to form seats and *the s'te s beingprovided with flanges forinterloc ing with saidseats.

- In testimony whereof I afiix' my signature in presence of two witnesses.

HARVEY B. FULLER. Witnesses: i H. S. JoHNsoN,

EMILY EASTMAN.

1. A ladder constructed of sheet metal, the 

